>5333192
First, a SLBM is not designed for targeting moving aircraft at any range, much less the range being implied here.
Second, the problem with the skunkbayweather.com image is that the long camera integration time causes simple light sources to look like long streaks. A rocket exhaust, which is very bright, would look very different.
skunkbayweather.com uses 3 Olympus SP500 cameras (see: https://www.skunkbayweather.com/About.html) which have a CCD focal plane array. (see https://www.dcresource.com/reviews/olympus/sp500uz-review/)
At the time the "missile" image was taken, the camera had an integration time of approximately 22 seconds and a revisit time of about 45 seconds.
A missile plume imaged by that camera with such a long integration time would cause blooming the CCD. The image would look very different if the streak were caused by a SLBM, but it would look just like it did if it were caused by an airborne navigation lamp.